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cschlaefcke
 Post subject: Help: Projections.max
PostPosted: Mon Mar 20, 2006 1:16 pm 
Newbie

Joined: Fri Nov 14, 2003 8:37 am
Posts: 14
Location: Hamburg - Germany
Hi Folks,

when I try to iterate over the resulting list of:

Criteria crt = session.createCriteria(Topic.class);

crt.setProjection(Projections.projectionList().
add(Projections.max("topicTime")).
add(Projections.groupProperty("topicId"))
);

return crt.list();

I don´t get a list of Topics. Instead I get a list of: "CLASS_NAME = [Ljava.lang.Object;"

What´s wrong? How do I tell the criteria to return a List of Topics?

Thanks & Regards,

Chris

Hibernate version: 3.1.2
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davilch
 Post subject:
PostPosted: Mon Mar 20, 2006 1:39 pm 
Newbie

Joined: Mon Mar 20, 2006 1:16 pm
Posts: 5
My understanding is that you would use a Transformer. There is an example here http://blog.hibernate.org/cgi-bin/blosx ... d_sql.html.

I have used AliasToBeanResultTransformer successfully. Your code would look something like this

Code:
crt.setProjection(Projections.projectionList().
add(Projections.max("topicTime"), "topicTime").
add(Projections.groupProperty("topicId"), "topicId").
setResultTransformer( new AliasToBeanResultTransformer(Topic.class))
);

return crt.list();
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cschlaefcke
 Post subject:
PostPosted: Tue Mar 21, 2006 5:03 am 
Newbie

Joined: Fri Nov 14, 2003 8:37 am
Posts: 14
Location: Hamburg - Germany
That did the trick! Thanks!

davilch wrote:
My understanding is that you would use a Transformer. There is an example here http://blog.hibernate.org/cgi-bin/blosx ... d_sql.html.

I have used AliasToBeanResultTransformer successfully. Your code would look something like this

Code:
crt.setProjection(Projections.projectionList().
add(Projections.max("topicTime"), "topicTime").
add(Projections.groupProperty("topicId"), "topicId").
setResultTransformer( new AliasToBeanResultTransformer(Topic.class))
);

return crt.list();
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